Now that we've finally finished our casita in North Baja Mexico we're considering expanding our portfolio somewhere warmer in the coming months or years.. 

It can come at the very end so that you're not wasting your time (and theirs), but the kind of long term damage that a bad tenant will cause to a property is not something that they can quickly and easily hide so you want to get eyes on how they are currently living.The age of the house has nothing to do with section 8.

We demolished our garage, expanded the footprint, and have an addition + garage on the lower level and then the 2/1 ADU as the top level.

I did this and pulled 100% of funds from my Roth IRA and used the capital to expand in RE.

If they are professional, they can explain this quickly and easily.

This can minimize potential liability or tax issues later on.Bank Accounts for Each LLC: While using a single business account may be convenient initially, opening separate bank accounts for each LLC might be necessary as you expand to maintain a clear distinction between each entity’s finances.

If you intend to use the home for personal use, it should be easily accessible.3.

If there was a substantial amount of extra work needed, however, I could easily see how it could get up to $3,000 or even more.

In Cleveland they cash flow well and you can build a foundation of knowledge this way and a base you can expand upon in the future if desired. 

Sure... with a W-2 it can easily be challenged.